Bosch HCBG21 Blue Granite Hammer Drill Bit Carbide Tip 5/8 x 10 x 12 Review

i had to drill a hole in two pieces of a granite post.I used a standard hammer drill (not a rotary hammer).started out great but 3-4 inches in the bit was shot.i'm still pretty happy with it though.they drill threw masonry like butter.

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Product Description:
The Bosch HCBG21 is a 5/8 inch Industrial Hammer Drill Bit. The BlueGranite hammer drill bit deliver fast impact drilling in concrete, stone and masonry. It has low voltage, high temperature brazing which prevents the carbide cutting edge from breaking out even when heat builds up during deep drilling.

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